From 5f40ace47be289c74ad95948c75ed86676158639 Mon Sep 17 00:00:00 2001 From: Aaron Seigo Date: Sat, 6 Dec 2014 02:33:51 +0100 Subject: resource -> synchronizer the resource will be the plugin that interacts with the source and store --- synchronizer/CMakeLists.txt | 13 +++ synchronizer/listener.cpp | 192 ++++++++++++++++++++++++++++++++++++++++++++ synchronizer/listener.h | 63 +++++++++++++++ synchronizer/main.cpp | 25 ++++++ 4 files changed, 293 insertions(+) create mode 100644 synchronizer/CMakeLists.txt create mode 100644 synchronizer/listener.cpp create mode 100644 synchronizer/listener.h create mode 100644 synchronizer/main.cpp (limited to 'synchronizer') diff --git a/synchronizer/CMakeLists.txt b/synchronizer/CMakeLists.txt new file mode 100644 index 0000000..92cb465 --- /dev/null +++ b/synchronizer/CMakeLists.txt @@ -0,0 +1,13 @@ +project(akonadinext_synchronizer) + +include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}) + +set(akonadinextsynchronizer_SRCS + main.cpp + listener.cpp +) + +add_executable(${PROJECT_NAME} ${akonadinextsynchronizer_SRCS}) +target_link_libraries(${PROJECT_NAME} akonadinextcommon) +qt5_use_modules(${PROJECT_NAME} Widgets Network) +install(TARGETS ${PROJECT_NAME} DESTINATION bin) diff --git a/synchronizer/listener.cpp b/synchronizer/listener.cpp new file mode 100644 index 0000000..23a5a70 --- /dev/null +++ b/synchronizer/listener.cpp @@ -0,0 +1,192 @@ +#include "listener.h" + +#include "common/console.h" +#include "common/commands.h" +#include "common/handshake_generated.h" +#include "common/revisionupdate_generated.h" + +#include +#include + +Listener::Listener(const QString &resource, QObject *parent) + : QObject(parent), + m_server(new QLocalServer(this)), + m_revision(0) +{ + connect(m_server, &QLocalServer::newConnection, + this, &Listener::acceptConnection); + Console::main()->log(QString("Trying to open %1").arg(resource)); + if (!m_server->listen(resource)) { + // FIXME: multiple starts need to be handled here + m_server->removeServer(resource); + if (!m_server->listen(resource)) { + Console::main()->log("Utter failure to start server"); + exit(-1); + } + } + + if (m_server->isListening()) { + Console::main()->log(QString("Listening on %1").arg(m_server->serverName())); + } + + QTimer::singleShot(2000, this, SLOT(checkConnections())); +} + +Listener::~Listener() +{ +} + +void Listener::setRevision(unsigned long long revision) +{ + if (m_revision != revision) { + m_revision = revision; + updateClientsWithRevision(); + } +} + +unsigned long long Listener::revision() const +{ + return m_revision; +} + +void Listener::closeAllConnections() +{ + //TODO: close all client connectionsin m_connections + for (Client &client: m_connections) { + if (client.socket) { + client.socket->close(); + delete client.socket; + client.socket = 0; + } + } +} + +void Listener::acceptConnection() +{ + Console::main()->log(QString("Accepting connection")); + QLocalSocket *socket = m_server->nextPendingConnection(); + + if (!socket) { + return; + } + + Console::main()->log("Got a connection"); + Client client("Unknown Client" /*fixme: actual names!*/, socket); + connect(socket, &QIODevice::readyRead, + this, &Listener::readFromSocket); + m_connections << client; + connect(socket, &QLocalSocket::disconnected, + this, &Listener::clientDropped); + +} + +void Listener::clientDropped() +{ + QLocalSocket *socket = qobject_cast(sender()); + if (!socket) { + return; + } + + Console::main()->log("Dropping connection..."); + QMutableVectorIterator it(m_connections); + while (it.hasNext()) { + const Client &client = it.next(); + if (client.socket == socket) { + Console::main()->log(QString(" dropped... %1").arg(client.name)); + it.remove(); + break; + } + } + + checkConnections(); +} + +void Listener::checkConnections() +{ + if (m_connections.isEmpty()) { + m_server->close(); + emit noClients(); + } +} + +void Listener::readFromSocket() +{ + QLocalSocket *socket = qobject_cast(sender()); + if (!socket) { + return; + } + + Console::main()->log("Reading from socket..."); + for (Client &client: m_connections) { + if (client.socket == socket) { + Console::main()->log(QString(" Client: %1").arg(client.name)); + client.commandBuffer += socket->readAll(); + // FIXME: schedule these rather than process them all at once + // right now this can lead to starvation of clients due to + // one overly active client + while (processClientBuffer(client)) {} + break; + } + } +} + +bool Listener::processClientBuffer(Client &client) +{ + static const int headerSize = (sizeof(int) * 2); + Console::main()->log(QString("processing %1").arg(client.commandBuffer.size())); + if (client.commandBuffer.size() < headerSize) { + return false; + } + + int commandId, size; + commandId = *(int*)client.commandBuffer.constData(); + size = *(int*)(client.commandBuffer.constData() + sizeof(int)); + + if (size <= client.commandBuffer.size() - headerSize) { + QByteArray data = client.commandBuffer.mid(headerSize, size); + client.commandBuffer.remove(0, headerSize + size); + + switch (commandId) { + case Commands::HandshakeCommand: { + auto buffer = Akonadi::GetHandshake(data.constData()); + Console::main()->log(QString(" Handshake from %1").arg(buffer->name()->c_str())); + sendCurrentRevision(client); + break; + } + default: + // client.hasSentCommand = true; + break; + } + + return client.commandBuffer.size() >= headerSize; + } else { + return false; + } +} + +void Listener::sendCurrentRevision(Client &client) +{ + if (!client.socket || !client.socket->isValid()) { + return; + } + + auto command = Akonadi::CreateRevisionUpdate(m_fbb, m_revision); + Akonadi::FinishRevisionUpdateBuffer(m_fbb, command); + Commands::write(client.socket, Commands::RevisionUpdateCommand, m_fbb); + m_fbb.Clear(); +} + +void Listener::updateClientsWithRevision() +{ + auto command = Akonadi::CreateRevisionUpdate(m_fbb, m_revision); + Akonadi::FinishRevisionUpdateBuffer(m_fbb, command); + + for (const Client &client: m_connections) { + if (!client.socket || !client.socket->isValid()) { + continue; + } + + Commands::write(client.socket, Commands::RevisionUpdateCommand, m_fbb); + } + m_fbb.Clear(); +} diff --git a/synchronizer/listener.h b/synchronizer/listener.h new file mode 100644 index 0000000..dcc3818 --- /dev/null +++ b/synchronizer/listener.h @@ -0,0 +1,63 @@ +#pragma once + +#include +#include +#include +#include + +#include + +class Client +{ +public: + Client() + : socket(nullptr), + hasSentCommand(false) + { + } + + Client(const QString &n, QLocalSocket *s) + : name(n), + socket(s), + hasSentCommand(false) + { + } + + QString name; + QLocalSocket *socket; + QByteArray commandBuffer; + bool hasSentCommand; +}; + +class Listener : public QObject +{ + Q_OBJECT + +public: + Listener(const QString &resourceName, QObject *parent = 0); + ~Listener(); + + void setRevision(unsigned long long revision); + unsigned long long revision() const; + +Q_SIGNALS: + void noClients(); + +public Q_SLOTS: + void closeAllConnections(); + +private Q_SLOTS: + void acceptConnection(); + void clientDropped(); + void checkConnections(); + void readFromSocket(); + +private: + bool processClientBuffer(Client &client); + void sendCurrentRevision(Client &client); + void updateClientsWithRevision(); + QLocalServer *m_server; + QVector m_connections; + unsigned long long m_revision; + flatbuffers::FlatBufferBuilder m_fbb; +}; diff --git a/synchronizer/main.cpp b/synchronizer/main.cpp new file mode 100644 index 0000000..91c0a9a --- /dev/null +++ b/synchronizer/main.cpp @@ -0,0 +1,25 @@ + +#include + +#include "common/console.h" +#include "listener.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + + new Console(QString("Resource: %1").arg(argv[1])); + if (argc < 2) { + Console::main()->log("Not enough args"); + return app.exec(); + } + + Listener *listener = new Listener(argv[1]); + + QObject::connect(&app, &QCoreApplication::aboutToQuit, + listener, &Listener::closeAllConnections); + QObject::connect(listener, &Listener::noClients, + &app, &QCoreApplication::quit); + + return app.exec(); +} \ No newline at end of file -- cgit v1.2.3